118 Elements and Their Symbols and Atomic Numbers: The periodic table is a well-organized chart that contains all the known elements in the universe.These elements are building blocks of matter ...

What do they all mean? And what is the table actually used for? Dr. Tim: So this is the periodic table and each letter on it represents a different element. We call these letters symbols.

organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number. Scientists use the periodic table to quickly refer to information ...

The same chemical symbols are used all over the world, no matter which language is spoken, which makes them very useful. nitrogen N A colourless gas which has no smell Found in air – 78 % of ...